The Least Common Multiple (LCM) for 40 63 is 2,520.
The Least Common Multiple of 189, 441, and 63 is 1323.
The Least Common Multiple of 5, 63, and 35 is 315.
The LCM is 63.
The least common multiple for 7 and 9 is 63.
28 multiples are 7,4,1,2,14,28, 63 multiples are 1.63.3.3.7 greatest is 7
Any multiple of 2520
Any pair of numbers has an infinite set of common multiples. The lowest common multiple of 9 and 21 is 63 and the others are multiples of this, e.g. 63, 126, 189, 252, 315, ...
You need at least two numbers to find a common multiple. Multiples of 21 in that range include 21, 42, 63 and 84
Common multiples result from comparing one number to at least one other. You've neglected to mention that other number. Multiples of 21 in that range are 21, 42, 63 and 84.
252
It is the first multiple that both numbers have in common 7 14 21 28 35 42 49 56 63 70 9 18 27 36 45 54 63 72 Look through the numbers, and you will see that 63 is the least common multiple.
The lowest common multiple of 7 and 9 is 63. The common multiples of 7 and 9 are therefore the infinite set of multiples of 63. Thus, the common multiples of 7 and 9 are 63, 126, 189, 252, 315, 378, 441, 504, 567, 630, 693, and so on.